:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --surface: #12151c;
  --surface-2: #181c25;
  --surface-3: #202533;
  --border: #262c3a;
  --text: #e6e8ee;
  --muted: #8a92a5;
  /* ESTA brand */
  --primary: #eb6109;
  --primary-text: #ffffff;
  --navy: #29235c;
  --danger: #ec5840;
  --radius: 12px;
  --shadow: rgb(0 0 0 / 0.6);
  --backdrop: rgb(4 6 10 / 0.7);
  --font: "Source Sans 3", "Source Sans Pro", "Helvetica Neue", Helvetica, Arial, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* Light theme, chosen with the header toggle (dark by default) */
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f4f7;
  --surface: #ffffff;
  --surface-2: #f1f3f7;
  --surface-3: #e6e9f0;
  --border: #dde1e9;
  --text: #1c1e2b;
  --muted: #5f6678;
  --danger: #c8381f;
  --shadow: rgb(20 24 40 / 0.18);
  --backdrop: rgb(20 24 40 / 0.45);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 var(--font);
}

svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
a { color: inherit; }
.muted { color: var(--muted); }
.nowrap { white-space: nowrap; }

/* Layout */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 32px;
  border-bottom: 3px solid var(--primary);
  background: linear-gradient(90deg, var(--navy), var(--surface) 70%);
}
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.topbar .btn-ghost { color: #fff; border-color: rgb(255 255 255 / 0.25); }
.topbar .btn-ghost:hover { background: rgb(255 255 255 / 0.1); }
.theme-toggle { width: 38px; padding: 8px; justify-content: center; }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .icon-sun, :root[data-theme="light"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .topbar { background: linear-gradient(90deg, var(--navy), #3a347a 70%); }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.brand img { display: block; height: 34px; width: auto; }
.brand span { padding-left: 14px; border-left: 1px solid rgb(255 255 255 / 0.25); font-size: 15px; font-weight: 600; color: rgb(255 255 255 / 0.85); }
main { padding: 24px 32px 48px; }

.messages { padding: 12px 32px 0; }
.message { margin: 0; padding: 10px 14px; border-radius: 8px; background: var(--surface-2); border: 1px solid var(--border); }
.message.error { border-color: color-mix(in srgb, var(--danger) 50%, transparent); color: var(--danger); }

/* Controls */
input, select, textarea {
  width: 100%;
  padding: 9px 11px;
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
}
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
:root:not([data-theme="light"]) input[type="date"]::-webkit-calendar-picker-indicator { filter: invert(0.8); }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 14px;
  font: inherit; font-weight: 600;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-3); }
.btn-primary { color: var(--primary-text); background: var(--primary); border-color: var(--primary); }
.btn-primary:hover { background: color-mix(in srgb, var(--primary) 85%, white); }
.btn-ghost { background: transparent; }
.btn-danger { color: var(--danger); background: transparent; border-color: color-mix(in srgb, var(--danger) 40%, transparent); }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }
.btn-small { padding: 5px 12px; font-size: 13px; }
.btn-block { width: 100%; justify-content: center; }
.icon-btn {
  width: 32px; height: 32px; flex: none;
  font-size: 20px; line-height: 1;
  color: var(--muted); background: none; border: 0; border-radius: 8px; cursor: pointer;
}
.icon-btn:hover { color: var(--text); background: var(--surface-3); }

/* Toolbar */
.toolbar { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 18px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters input { width: 280px; }
.filters select { width: auto; }
.actions { display: flex; gap: 8px; }

/* Report table */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.report { width: 100%; border-collapse: collapse; }
.report thead th { border-bottom: 2px solid var(--navy); }
.report th {
  position: sticky; top: 0;
  padding: 12px 14px;
  text-align: left; font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--muted); background: var(--surface);
}
.report td { padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.report tbody tr { box-shadow: inset 4px 0 0 var(--state, var(--border)); }
.report tbody tr:nth-child(even) { background: color-mix(in srgb, var(--surface-2) 60%, transparent); }
.report tbody tr:hover { background: var(--surface-2); }
.report tbody tr:last-child td { border-bottom: 0; }
.report td:first-child { padding-left: 20px; }
.report .num { text-align: center; }
.report .rank { font-weight: 700; }
.report .clip { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.report .stack span { display: block; white-space: nowrap; }
.report .stack span + span { margin-top: 4px; }
.report .empty td { padding: 48px; text-align: center; color: var(--muted); box-shadow: none; }

.status { font-weight: 700; color: var(--state); white-space: nowrap; }
:root[data-theme="light"] .status { color: color-mix(in srgb, var(--state) 65%, black); }
.btn-state { color: #0b0d12; background: var(--state); border-color: var(--state); }
.btn-state:hover { background: color-mix(in srgb, var(--state) 85%, white); }

/* Cards & login */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.login { max-width: 360px; margin: 12vh auto 0; display: grid; gap: 16px; }
.login { border-top: 3px solid var(--primary); }
.login h1 { margin: 0; font-size: 24px; }
.login p { margin: 0; }

/* Forms */
.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field > span { font-size: 12px; font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase; color: var(--muted); }
.field > span small { margin-left: 6px; text-transform: none; letter-spacing: 0; font-weight: 400; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.errorlist { margin: 0; padding: 0; list-style: none; color: var(--danger); font-size: 13px; }
.form-errors { margin-bottom: 16px; padding: 10px 14px; border-radius: 8px; background: color-mix(in srgb, var(--danger) 10%, transparent); }

/* Modal */
.modal {
  width: min(980px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  padding: 0;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 24px 80px var(--shadow);
}
.modal::backdrop { background: var(--backdrop); backdrop-filter: blur(3px); }
.modal-header, .modal-footer { display: flex; align-items: center; gap: 8px; padding: 18px 24px; }
.modal-header { justify-content: space-between; border-bottom: 1px solid var(--border); box-shadow: inset 0 3px 0 var(--primary); border-radius: 16px 16px 0 0; }
.modal-header h2 { margin: 0; font-size: 18px; }
.modal-footer { border-top: 1px solid var(--border); }
.modal-footer .spacer { flex: 1; }
.article-form .form-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 32px; padding: 22px 24px 8px; }
.article-form .form-errors { margin: 16px 24px 0; }

.journal-picker { position: relative; }
.suggestions {
  position: absolute; top: 100%; left: 0; right: 0; z-index: 10;
  max-height: 280px; overflow-y: auto;
  margin: 4px 0 0; padding: 4px; list-style: none;
  background: var(--surface-3); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 12px 32px var(--shadow);
}
.suggestions li { padding: 8px 10px; border-radius: 6px; cursor: pointer; }
.suggestions li small { display: block; color: var(--muted); }
.suggestions li:hover, .suggestions li.active { background: var(--surface-2); }

.ranks { width: 100%; border-collapse: collapse; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.ranks th, .ranks td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.ranks th { font-size: 12px; font-weight: 600; color: var(--muted); background: var(--surface-2); }
.ranks tr:last-child td { border-bottom: 0; }
.ranks .rank { font-weight: 700; }

.authors-head, .author-row { display: grid; grid-template-columns: 1fr 90px 32px; gap: 10px; align-items: start; }
.authors-head { margin-bottom: 6px; font-size: 12px; font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase; color: var(--muted); }
.author-row { margin-bottom: 10px; }
.author-row[hidden] { display: none; }
.add-author { margin-top: 2px; }
.hint { font-size: 12px; }

@media (max-width: 800px) {
  .topbar, main { padding-left: 16px; padding-right: 16px; }
  .filters input { width: 100%; }
  .article-form .form-grid { grid-template-columns: 1fr; gap: 8px; }
}